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FOC | Family List | FOC Vol. 2-3 | Equisetaceae | Equisetum

8. Equisetum hyemale Linnaeus, Sp. Pl. 2: 1062. 1753.

木贼 mu zei

Plants large. Rhizome creeping or erect, blackish brown, nodes and roots with long yellowish brown trichomes. Aerial stem perennial, monomorphic, green, up to or more than 1 m tall, (3-)5-9 mm in diam. at middle, not branched or base with few erect lateral branches; internodes 5-8 cm. Aerial stem 16-22-ridged; ridges arc-shaped abaxially or nearly rectangular, without conspicuous tubercles or with 2 rows of tubercles; sheath 0.7-1.1 cm, blackish brown or both distal portion and base with a blackish brown band, or only distal portion with a blackish brown band; sheath teeth 16-22, lanceolate, small, 0.3-0.5 cm, teeth of distal portion light brown, membranous, aristate, caducous, teeth of lower portion blackish brown, abaxially 3- or 4-ridged at base, thinly leathery, persistent or falling off early with sheath tube. Strobilus ovate, 1-1.6 cm, 0.4-0.7 cm in diam., apex with small acute tip, sessile. 2n = 216.

Forests, stream banks; 100-3000 m. Chongqing, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jilin, Liaoning, Nei Mongol, Shaanxi, Sichuan, Xinjiang [Japan, Korea, Mongolia, Russia; C and SW Asia, Europe, Central and North America].

1 Plants up to or more than 1 m tall; ridges with 2 rows of tubercles; sheath teeth 4-ridged abaxially.   8a subsp. hyemale
+ Plants up to 1.5 m tall; ridges without conspicuous tubercles; sheath teeth 3-ridged abaxially.   8b subsp. affine

Lower Taxa


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